获取网页编码

if(document.charset){
    document.writeln('<script src="http://www.zzwcw.com/swt/bottomfloat.js" charset="GBK"></script>');
}else if(document.characterSet){
document.writeln('<script src="http://www.zzwcw.com/swt/bottomfloat.js" charset="utf-8"></script>');
}




<html>
<head>
   <meta http-equiv="content-type" content="text/html; charset=gbk">
</head>
<script  type="text/javascript">
function getPageCharset(){
    var charSet = "";
    var oType = getBrowser();
    switch(oType){
        case "IE":
            charSet = document.charset;
            break;
        case "FIREFOX":
            charSet = document.characterSet;
            break;
		case "CHROME":
		  charSet = document.characterSet;
            break;
        default:
            break;
    }
    return charSet;
}
function getBrowser(){
    var oType = "";
    if(navigator.userAgent.indexOf("MSIE")!=-1){
        oType="IE";
    }else if(navigator.userAgent.indexOf("Firefox")!=-1){
        oType="FIREFOX";
    }else if(navigator.userAgent.indexOf("WebKit")!=-1 ){
	  oType="CHROME";
	}
    return oType;
}
alert(getPageCharset());
</script>
<body>
   
</body>
</html>


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